To remove larger solid materials and rags in order to protect the submersible nonclog pumps, a removable bar rack type screen shall be provided where the wastewater enters the wetwell. Bar rack screens will not be required for submersible grinder pumps. Bars shall be one-half inch in diameter at two and one-half inches on centers. The bar rack shall be fabricated of aluminum with stainless steel fittings. The rack shall be designed to allow raking of trash onto a drainage plate. The influent line and the bar rack shall be offset as far as possible towards the corner away from the landing area at the bottom of the ladder.

Adequate space (approximately three feet) shall be provided to enable an operator to stand in front of the drain plate and rake the trash from the bar rack on to the drain plate. (Design Guideline DG-08 § 5.5, dated August 2006)